baber/WOPTO huggingface dataset:
Patent GB-219688-A (GB)
Title: Arrangement for accelerating the circulation of water in hot-water heating installations
IPC: F24D3/02
Filed: 1924-07-22
Abstract: 219,688. Tcherniakofshy, I. July 28, 1923, [Convention date]. Heating buildings.-The circulation of water in a hot-water heating system is accelerated by the insertion in the flow-pipe 2 connecting the boiler 1 and expansion chamber 3 of a multitubular heat-exchanger 4 which is adapted to be cooled by water returning to the boiler from the radiators 6 through the pipe 7. A portion of the return water passes direct to the boiler through a throttle-valve 11, while the remainder passes through the heat-exchanger 4 by pipes 8, 9, the relative quantities being determined by the position of the valve 11 which is controlled by a pressure actuated regulator 13 of the type described in Specification 213,572, connected between the flow and return pipes and co-operating with a counterweighted lever 16 and a chain 17 having an elastic portion 25. By means of a second chain 18 the regulator 13 and lever 16 also control an air-admission valve 12 for the boiler furnace. The heat-exchanger 4 comprises an inner series of tubes 19, Fig. 2, communicating between chambers 20, 21, which are connected respectively to the boiler 1 and expansion chamber 3, and a surrounding series of tubes 22 communicating between chambers 23, 24, to which the pipes 8, 9 are connected.
Patent GB-473372-A (GB)
Title: An improved screw propeller
IPC: B63H1/12
Filed: 1936-06-24
Abstract: 473,372. Screw propellers. McLEOD, G. H. June 24, 1936, No. 17562. Convention date, July 10, 1935. [Class 114] Each blade of a screw propeller is provided at its outer end with at least one extension which is bent over with respect to the adjoining tip portion of the blade and tapers in width radially of the surface from zero on the leading edge to a maximum at the following edge such maximum being not less than one quarter of the width of the main part of the blade. Blades 1 are provided with bent over portions 9 at the tip 4. These portions have an outer edge 8 shaped so that the dimension is zero at the leading edge 6 and increases gradually to a maximum at the following edge 7. The radial cross sections of this extension have concave or convex surfaces of graded radius as indicated in Fig. 4. As an alternative each tip may be provided with two bent over portions, Fig. 5, oppositely disposed and the second member has its width variations opposition to that of the first one.
Patent GB-365478-A (GB)
Title: Improvements in or relating to respirators
IPC: A62B23/00
Filed: 1931-06-17
Abstract: 365,478. Respirators. SOC. ITALIANA PIRELLI, 21, Via Fabio Filzi, Milan, Italy. June 17, 1931, No. 17608. Convention date, July 16, 1930. [Class 81 (ii).] In a filter canister 1 for respirators the suction tube 6 passes into the mass of the filter material 2 and the noxious gases are drawn in at both ends. As shown the tube 6 is secured to a central chamber formed by spaced perforated plates 4, 5, the filter material 2 being packed between sheets 13, 14 of gauze and cellulose on the outer sides of the plates. The canister 1 is closed at the top by a cover 8 and at the bottom by a perforated plate 12 against which the whole contents are pressed by a spring 7 around the tube 6 and between the cover 8 and a perforated cover-plate 9. The noxious gases enter through the plate 12 and holes 10 in the canister. The tube 6 is covered as at 15 when not in use. In modifications the plates 4, 5 may be secured to the canister, the contents of which are then arranged symmetrically, and partitions parallel to the canister axis may be provided to prevent packing of the filter material and to ensure axial flow of the gases.
Patent GB-530092-A (GB)
Title: Improvements in electric irons and other electrically heated utensils
IPC: D06F75/26
Filed: 1939-06-16
Abstract: 530,092. Electric irons. COLLINS, G. H., and COLLINS, H. F. June 16, 1939, No. 17640. [Class 39 (iii)] An iron or other utensil is provided with a current supply indicating lamp 28 arranged in a compartment with openings or windows on a number of sides and supplied with current directly from the main terminals of the utensil or by a shunt circuit from the heating elements. The lamp housing is held in position between the cover 24 of an iron and the forward leg of the handle 22. A U-shaped grid or cover at the front of the casing is secured by a spring 41 which presses the grid against the bottom of the housing. A heater element 11 comprises a resistance winding on a flat insulating former clamped between insulating cover sheets. Conducting strips 48 connected to the resistance winding extend through the cover sheets and are gripped between contact pins 14 and sleeves 9, and further conducting strips 15 extend upwards from the pins to form spring contacts for the lamp.
Patent GB-981360-A (GB)
Title: Separation of an actinide metal from an alloy
IPC: C08F265/04
Filed: 1963-05-03
Abstract: A method for extracting the actinide metal from an alloy (Th-Mg, Th-Zn or U-Zn) comprises dissolving the alloy in molten lithium under an inert gas atmosphere, the actinide metal being precipitated as a finely divided solid which may then be filtered. Residual Li, Mg or Zn may then be removed by heating the actinide metal residue under vacuum or by placing it in water at a pH of 7-8 followed by certrifuging or filtering.  The actinide concentrate may then be consolidated by inert-gas arc melting. The lithium in the dissolution step should be at a temperature of at least 50  DEG C. above the melting point of the Mg-Li or Mg-Zn alloy produced (e.g. 400-600  DEG C.).  U.S.A. Specification 2,942,968 is referred to.
Patent GB-707715-A (GB)
Title: Improvements in or relating to oil-retaining fittings for use with oil-filled electric cables
IPC: H02G15/22
Filed: 1952-07-14
Abstract: 707,715. Cable end sleeves. PIRELLIGENERAL CABLE WORKS, Ltd., and HILLYARD, P. F. March 12, 1953 [July 14, 1952], No. 17694/52. Class 36 An oil-retaining cable-end fitting comprises a metal container 1 having an aperture embracing and secured in a fluid-tight manner to the cable sheath and an aperture 8 for each of the cable cores 4, in which the cores.are secured by a fluid-light gland constituted by a flexible ring 10 of U-shaped cross-section. The con- .tainer may be of conical shape, having its narrow end soldered to the cable sheath and its wider end closed by a metal plate 6 in which the apertures 8 are formed. Each of the apertures has an upstanding rim 9 in which is inserted the flexible ring 10. A flange.11 on ring 10 rests on the rim 9, and a collar 12 is positioned thereover and secured by a circumferential clip 14.
Patent GB-1142937-A (GB)
Title: Shaping metal-wire reinforced plastics material
Inventor: GLEN JOHN
IPC: E06B7/082
Filed: 1966-04-22
Abstract: 1,142,937. Shaping plastics material. ELDERS WALKER & CO. Ltd., 9 Feb. 1967 [22 April, 1966], No. 17701/66. Heading B6J. A sheet of rigid metal-wire reinforced plastics material 3, e.g. polyvinyl chloride reinforced with galvanized steel wire, is shaped by heating to the softening temperature of the plastics material e.g. 240‹ F. (for 3-5 minutes), bending the sheet between dies or formers 1, 2 of a material which is substantially unaffected as regards its dimensions and surface characteristics by the softening temperature and having a thermal conductivity lower than that of metals e.g. hardwood, allowing the formed sheet to set whilst within the formers and trimming the formed sheet with a saw operated at a speed suitable for cutting the reinforced plastics material. The bar 4 is movable by handle 5 under the lip of lower die 1 when the two dies are together to further bend the sheet.
Patent GB-574170-A (GB)
Title: Process of manufacturing electric resistance elements durable at high temperature and proof against chemical action
IPC: H01C7/00
Filed: 1943-10-27
Abstract: Resistance heating elements consist of a mixture of silicon carbide with carbide, nitride, silicide, or boride of chromium, and carbide, nitride, silicide, or boride of beryllium, molybdenum, tungsten, titanium, or vanadium, with or without nitride, silicide, boride or oxide of manganese, iron, nickel, or cobalt.  The additional carbide, silicide, nitride, oxide, or boride may be obtained by adding a metal, metal oxide, or other compound capable of reacting with silicon carbide, or the metal or metal compound may be mixed with carbon or silicon or compound of nitrogen, oxygen, or boron, and added to the silicon carbide.  The resulting composition may be used as a resistance rod, or may be crushed to granular form, or may form a coating on carbon or graphite elements.  The Specification as open to inspection under Sect. 91 describes electric resistance heating elements consisting of silicon carbide with carbide, nitride, silicide, boride, or oxide, of beryllium, molybdenum, tungsten, titanium, vanadium or chromium, with or without nitride, silicide, boride, or oxide, of manganese, iron, nickel or cobalt.  This subject-matter does not appear in the Specification as accepted.
Patent GB-1344915-A (GB)
Title: Photosensitive composition
IPC: G03F7/038
Filed: 1971-05-28
Abstract: 1344915 Photoresist materials INTERNATIONAL BUSINESS MACHINES CORP 28 May 1971 [2 July 1970 17803/71 Heading G2C [Also in Division C3] Photo-sensitive compositions, suitable for making photo-resists, comprise a photo-sensitive compound containing a 1, 2-dithiacycloalkane ring. Three different embodiments are described, as follows: - (A) a 1, 2-dithiacycloalkane, preferably containing a carboxylic side-chain, may be added to a suitable polymer. In exemplified compositions, the 1, 2-dithiacycloalkane is selected from 1, 2-dithiacyclopentane-3-(and 4-) methanoic acid and similar compounds containing ethanoic, propanoic, butanoic or pentanoic acid groups in -3- or -4- positions; 1, 2-dithiacyclohexane; 1, 2-dithiacyclopentane-3-acetoxy-5- pentanoic acid; and methyl-1, 2-dithiacyclopentane - 4-methanoate; others also being listed. The polymers to which they are added are cyclized polyisoprene, polyisobutylene, novolak resin, polymethylmethacrylate, polyvinyl cinnamate, polychlorobutadiene, polyisopropylstyrene and styrene/butadiene copolymer; (B) the photo-sensitive compositon may comprise the reaction product of a 1, 2-dithiacycloalkane alkanoic acid halide with a hydroxyl group-containing polymer, the reaction product being used per se to make photo-sensitive films. In example 20, the reaction product of 1, 2- dithiacyclopentane-3-pentanoyl chloride with an epichlorohydrinepoxy copolymer is so used; (C) a reaction product as specified under (B) may be incorporated in other polymers. In example 19, the reaction product of 1,2-dithiacyclopentane-3-pentanoyl chloride with polyvinyl alcohol is added to cyclized rubber. The photoresist material may be baked for 10 minutes at 60‹C before exposure and for 20 minutes in nitrogen at 100‹ C after exposure and development. The glass support may have a chromium layer thereon.
Patent GB-571082-A (GB)
Title: Improvements in or relating to electric buzzers, and particularly to buzzers employed in electric clocks
IPC: G10K9/13
Filed: 1943-10-28
Abstract: 571,082. Electric clocks. SMITH & SONS (ENGLAND), Ltd., S. [formerly SMITH & SONS (MOTOR ACCESSORIES), Ltd., S.], and MOSS, E. B. Oct. 28, 1943, No. 17844. [Class 118 (ii)] In an electric buzzer comprising a vibratory armature energized by an electromagnet and having silencing means, particularly for a mains driven A.C. alarm clock, the silencing means comprise a control member to constrain the armature against movement towards the pole face of the magnet. The magnet coil 10 is in series with the synchronous motion of the clock and the armature is kept out of the influence of the magnet by a projection 28 riding on the high part of an adjustable cam disc 27, the projection being formed on a bell-crank lever 26, one limb of which engages a spring 19 secured to an arm 18 formed on the armature 14. At the time of alarm the projection rides into a notch 29 in the cam and enables a spring 21 to swing the armature into the influence of the magnet. The alarm is silenced by manually rotating the bell-crank lever clockwise, a knob 30 being provided for this purpose, in which position the bell-crank lever is held by a pawl 31 and moves and holds the armature away from the magnet. The cam disc rotates with the twenty-four hour wheel and, by the time that the notch 29 has moved away from the projection 28, a pin 33 thereon trips the pawl and releases the bellcrank so that the armature may again move into the attraction of the magnet the next time the notch registers with the projection. The arm 18 preferably has the same natural periodicity as that of the electric supply whilst that of the spring 19 is different. The inward movement of the armature is limited by an adjustable stop 20.
Patent GB-313447-A (GB)
Title: Improvements in or relating to vacuum electric tube devices
IPC: H01J9/04
Filed: 1929-06-11
Abstract: 313,447. Westinghouse Lamp Co., (Assignees of Marden, J. W.). June 11, 1928, [Convention date]. Vacuum tubes.-Caesium and one of the alkali metals, sodium, lithium, or potassium, having a greater affinity for hydrogen and a lower atomic weight are liberated in a discharge tube employing a caesiated cathode in order to clean up the residual gases and to prevent the destruction, on the cathode, of a layer of an electro-negative gas such as oxygen which is conducive to the formation of a caesium film thereon. A pellet comprising a small proportion of a non-hygroscopic compound of the alkali metal of lower atomic weight, such as the dichromate or permanganate of potassium, and a getter mixture containing a caesium compound is introduced into the device and is heated, e.g. by induced highfrequency currents, to cause the reduction of the compounds and the liberation of the alkali metals. The getter mixture may be that described in Specification 296,781 or one of those described in Specification 267,902. The compound of the alkali metal of lower atomic weight may be 10 to 50 per cent of the caesium compound. Silicon or boron, when employed, may be boiled in dilute hydrochloric acid to remove gases. The temperature of the reaction may be reduced by the addition of a small proportion of a metallic reducing agent e.g. the addition of one per cent of pure powdered aluminium reduces the temperature from 800‹ C. to 700‹ C. The electronegative gas layer is formed on the cathode, e.g. by heating in oxygen to 2000‹ C., prior to the liberation of the alkali metals.
Patent GB-280985-A (GB)
Title: Improvements in tobacco pipes
IPC: A24F1/06
Filed: 1926-07-16
Abstract: 280,985. Pourbaix, J. F. V. July 16, 1926. Tobacco pipes.-In a pipe fitted with a removable inner bowl 4 having a curved bottom with holes 6, 7 for the passage of smoke, absorbent filtering material 9 is supported in contact with the bottom of the inner bowl. As shown, the filtering material 9 is fitted in a downward extension 8 of the inner bowl, which may be screwed to engage the upper end of the outer bowl 1, or may be retained bv a cork ring 5. The stem portion 2 is provided with a smoke bore 10, a well 11, an absorbent wad 13, and an aluminium sleeve 14 engaged by the inner end of the mouthpiece 3. The outer bowl 1 and stem 2 may be of briar wood and the inner bowl 4 of meerschaum, clay, heat-resisting glass, or wood. Ir. a modification, the bore 10 and well 11 open into a chamber in the inner end of the mouthpiece, and an absorbent cartridge longer than the well 11 is placed in the well, the wad 13 being omitted. The Provisional Specification states also that the bowl and the bowl portion of the stem may be of indurite or of the substance known under the registered Trade Mark " Bakelite."
Patent GB-477217-A (GB)
Title: Improvements in or relating to radio receiving apparatus
IPC: H01J17/00
Filed: 1936-06-29
Abstract: 477,217. Wireless receiving-apparatus. GENERAL ELECTRIC CO., Ltd., and PETERS, W. H. June 29, 1936, No. 17978. [Class 40 (v)] A resonance indicator showing when a radio-receiver is correctly tuned, comprises a glow discharge tube of the kind in which the brightness and not the area or extent of the cathode glow increases with the discharge current. A glow tube having a ring cathode as shown is preferable, and may be housed behind a ground glass screen in the receiver panel. The tube is known per se. Specification 377,726 is referred to.
Patent GB-1519654-A (GB)
Title: Method and means for making dental castings
IPC: A61C13/12
Filed: 1976-05-03
Abstract: 1519654 Investment mould assembly for dental appliances PRECISION METALSMITH Inc 3 May 1976 [9 June 1975] 18012/76 Heading B5A An investment mould, Fig. 8, for the simultaneous static or contrifugal casting in gold or chrome alloy of a plurality of prosthetic dental appliances, is made by packing refractory slurry around a pattern, Fig. 1, which comprises a removable, e.g. expandable, central support 11 supporting at stems 28, an array of axially and circumferentially spaced models 12 of the appliances, which each comprise a refractory cast 13, Fig. 3, of an oral structure, supporting a pattern 15 in expendable wax of the dental appliance to be cast, and strips 17, 18 of wax defining a Y-shaped gating system 16 of the mould. The support 11 comprises a plurality of adjacent segments 25 which are preferably assembled at keys and keyways 31, 30, Fig. 5, arranged so that the models of adjacent arrays are circumferentially offset. The models are each attached, e.g. by hot melt adhesive, upon a stem 28, and the segments bearing the models are then assembled in adjacent relationship at the keyways and keys 30, 31, and optionally secured by adhesive, and a pouring cup pattern (not shown) is then attached to the lower end of the assembly. The pattern is then placed with the pouring cup pattern lowermost, in a flask, 41, Fig. 8, which is filled with refractory slurry, -and the dispensable parts of the pattern are then removed by melting, after hardening of the slurry to produce a mould comprising a pouring cup 43, tubular sprue 44, and gates 46 connecting to mould cavities 45, respectively defined by the expendable material of the segments 25, strips 17, 18 and pattern 15. Alternatively, the open end of the segments may be closed prior to pouring, to form a sprue which may be of solid section, or tubular when a separate core is inserted into the mould. Each segment 25 comprises a neck 26 and a recess 27 at opposite ends for engagement with adjacent segments. The segments 25 may be rectangular, triangular, hexagonal, or of circular section as in the embodiment, and may comprise an oppositely tapered bore to facilitate removal from the injection mould.
Patent GB-240589-A (GB)
Title: Improvements relating to the manufacture of iron oxide pigments and polishing materials
IPC: C01G49/06
Filed: 1924-07-29
Abstract: Ferric oxide of varying shades is made by mixing together solutions of iron sulphate and sodium carbonate with agitation and injection of air.  The precipitate is washed under pressure with hot and cold water and calcined at temperatures appropriate to the colour required.  To make a yellow hydrated oxide the precipitation process is stopped when the precipitate is greenish yellow and the precipitate is dried at low temperature.  An orange oxide may be obtained by conducting the precipitation at a higher temperature and drying at low temperature.  Specifications 23858/00, 23859/00, 19190/05, 25859/05, and 27515/06 are referred to.
Patent GB-680378-A (GB)
Title: Manufacture of vat dyestuffs of the anthraquinone series
IPC: C09B1/42
Filed: 1950-07-20
Abstract: 1,4 - Dibenzoylamino - 6,7 - dichloranthraquinones containing an alkyl sulphone group in one of the benzoylamino radicals are made by benzoylation of a 1-benzoylamino-4-amino-6,7 - dichloranthraquinone, an alkyl sulphone group being present in one of the benzoyl radicals. The products dye or print cotton, linen, artificial silk, or regenerated cellulose blue-red shades. In examples: (1) 1-benzoylamino - 4 - amino - 6,7 - dichloranthraquinone is reacted with 3-methylsulphone benzoyl chloride, 4-isopropyl sulphone benzoyl chloride, or 4-n-butyl sulphone benzoyl chloride.  Also in examples 1-(41-methoxy- or chloro-benzoylamino) - 4 - amino - 6,7 - dichloranthraquinone is reacted with 4-methylsulphone benzoyl chloride.  A dyeing example is given.  1 - Benzoylamino 4 amino - 6,7 - dichloranthraquinone is obtained from 2,3-dichloranthraquinone by nitration, reduction, nitration of the oxamic acid of 1-amino-6,7-dichloroanthraquinone, hydrolysis, benzoylation, and reduction.  Specifications 513,866, 549,640, [Group IV (b)], and 652,452 are referred to.
Patent GB-857963-A (GB)
Title: Improvements in or relating to a control unit for a dental handpiece of the fluid turbine type
IPC: A61C1/00
Filed: 1958-06-06
Abstract: 857,963. Dental engines. DENTISTS' SUPPLY CO. of NEW YORK. June 6, 1958 [June 18, 1957], No. 18200/58. Class 81 (2) [Also in Groups XXIX and XXXIV] In a dental handpiece 52 of the fluid turbine type comprising a rotor supported by bearings in a turbine chamber, the bearings are lubricated by oil supplied in mist form. The handpiece 52 is adapted to be mounted in the casing 10 of a control unit which comprises a control valve 22, to which a compressed air supply line 18 is attached, an air filter 24, a solenoid-actuated delivery valve 32 and a lubricator 34. Also provided in the casing 10 is a water supply comprising conduit 36, control valve 38, conduit 40 and delivery conduit 46. The apparatus is operated electrically, full depression of a foot treadle causing delivery valve 32 to open, thereby permitting gaseous fluid to flow and water to be delivered to handpiece 52, whilst only partial depression of the foot treadle causes delivery of the water only. In a further modification, a solenoid actuated inlet valve 166, mounted in the lower portion of a casing 10, controls the delivery of gaseous fluid under pressure to a filter 180, the head 202 of which comprises an adjustable spring-pressed ball valve 206. A sealed water container 224 may be put under pressure by gaseous fluid, supplied through a manually controlled needle valve 218, to deliver water through a flexible conduit 228 to the handpiece. Alternatively a solenoid -actuated water control valve 38 may be employed.
Patent GB-858110-A (GB)
Title: A new process for the production of 4-hydroxycoumarin and its derivatives
Inventor: SHAH VINOD RAMANLAL
IPC: C07D311/42
Filed: 1959-05-28
Abstract: Coumarins and thiacoumarins of the formula :  <FORM:0858110/IV(b)/1> wherein Ar denotes an ortho-arylene radical which may be substituted by one or more alkyl groups, R denotes hydrogen, alkyl or aryl and X denotes oxygen or sulphur, are prepared by reacting an appropriate aromatic compound:  Ar-X-H having at least one free ortho-position with a malonic acid of the formula :  <FORM:0858110/IV(b)/2> or the methyl or ethyl ester of such acid, in the presence of a mixture of phosphorous oxychloride and anhydrous zinc chloride at temperatures ranging from 30 DEG  to 110 DEG  C.  The reactant Ar-X-H may be phenol, thiophenol, ortho-, meta- or para-cressol, a xylenol, such as 2 : 5-dimethylphenol, a - or b -naphthol or thymol.
Patent GB-103643-A (GB)
Title: Improvements in Distribution for Automobile Vehicles.
IPC: H02J7/14
Filed: 1916-12-21
Abstract: 103,643. Soc. Anon. pour L'Eclairage Electrique des Vehicles. Jan. 21, 1916. [Convention date]. Preventing unauthorized starting or running of engine.-A distribution board for use on a motorvehicle carries switches 26, 27 for earthing the ignition magneto 4 and for connecting the electric engine-starting motor 3 to the battery 2. The switches may be locked by a lever 35 to prevent unauthorized running or starting of the engine. The lever 35 carries a projection 41, which, in the locking position of the lever, bears on the magneto switch 26 and forms an additional earthing connexion. A switch is used to control the car lighting.